McClelland Extensive Bulk Sample Testing of Ores, 10-12

To right of the screen is Cell One still with ore from 2005 Exploratory Mining during Goldspring Phase One, the ore on that pad may be dissolved of all gold, maybe not. Currently they are leaching Cell One with water only as Cyanide breaks down with water and sunlight. Ore on Cell One is from the Goldspring Phase One era when ore was crushed to 5-minus to 4-1/2-minus.Minus Sizing: means crushed gravel will pass through heavy metal screens with square openings/apertures of 5 inches and 4-1/2 inches - only ore less than 5 inches will pass through the "5-Minus" square holes. Larger ore will move on the shaking screens to a trough that recirculates the larger ore back to the crusher to be further reduced until it can pass through the 5 inch or 4-1/2 inch screens. Ore that large may have had a low efficiency of leaching, hence gold may still be in the ore. If the ore is crushed to a smaller "Minus" determined by McClellan, then cyanide leaching may claim more of the gold left behind. Studies are being conducted to determine if it is worthwhile to reprocess the large size ore. It had an average content of 0.04 OPT Gold (Au). Approximately in 1-2 months they will know for sure what to do with ore on Cell One.Sprinkling with Barren Solution is with either Misters or Drippers. Drippers are better for the Hartford Complex as they provide a more consistent coverage. Visitor perceives Cell One as a large heap.A 1000th of a percent - an approximate ratio of cyanide to water. Cyanide does not leach free gold, therefore a "Cut-Off Grade" determines whether ore is sent to grinding mill or leach pad.Described by Guy, Goldspring Operations Manager, during the June 13, 2008 mine visit of the GSPG Comstock property by Goldspring shareholders. Video recording by Bob Goldspringer.McClelland Laboratories, Inc. (MLI) Metallurgical and Environmental Engineering since 1987assists gold, silver, and copper mining companies determine Best Use of their Mineral Reserveby designing testing programs to estimate the specific mineral character of their ore bodies.Technicians and engineers in the McClelland Laboratory perform metallurgical ------------------------------ ------------1. Bench scale gravity concentration testing2. Flotation concentration testing 3. Bench and Pilot scale testing to determine most capable technology to process the unique ore minerals in the mine property such as---------------------------- ---------------_____ a. Heap leaching of Gold (Au), Silver (Ag) and/or Copper (Cu)_____ b. Direct, CPI, CIL Cyanidation _____ c. Bio-oxidation (heap and CSTR); Au, Ag, Cu _____ d. Thiosulfate leaching of problematic ores _____ e. Evaluation and optimization of solution recovery systems _____________ i. carbon ADR____________ ii. Zinc Precipitation___________ iii. Cu-SXEWproduces data of varied criteria enabling mining company officers to make decisions for systems of production.McClelland Laboratories typically conducts research in a compact time frame.-----------------McClelland Laboratories also creates Simulation of site conditions for environmental testing programs, protocols and environmental characterization testing services such as------------------------------- ------------1. NDEP Quarterly Monitoring compliance2. Leached heap neutralization rinse down tests3. Kinetic ARD potential testing4. Pit water quality evaluation5. Pit dewatering -- attenuation/mobilization studies6. Soils attenuation/mobilization testing for land application of mine solutions7. Passive and active wastewater treatment8. Leached heap (and milled tailings) amendment9. Revegetation studiesMcClelland Laboratories, Inc. 1016 Greg Street Sparks, Nevada 89431Client History http://www.mettest.com/client_... note at the bottom of the webpage - there are four more pages of clients. http://www.mettest.com (Metal Test)Phone: (775) 356-1300 Fax : (775) 356-8917 e-mail: mli@mettest.com

Channel: Education
Uploaded: December 31, 1969 at 5:59 pm
Author: Scheqky

Length: 07:21
Rating: 5.00
Views: 620

Tags: business  Comstock  District  economics  engineering  Gold  Goldhill  in  Lode  Mining  NV  of  physical  science  the  

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